Roof covering and the process of compounding same



Patented May 27, 1941 RG05 QQVERENG AND THE PRGCESS 9F CGIi EPQUNDING SAME Charlie A. Bartholomew, Van Nuys, Calif., assignor to the firm Woodworth & Turk, a copartnership between Oscar E. Woodworth and Frank .5. Turk, both of Les Angeles, Calif.

No Brewing. Application March 10, 1939, Serial No. 261,042

2 Claims.

My invention relates to that class of compositions which are adapted to be applied to a roof either in the form of a fabricated covering or as a supplemental covering to be applied to an already existant covering.

In virtually all of the coverings available at the present time the materials used have an asphaltic base either with or without additional covering such as mineral granules. In either of the above types the life of the roof depends upon the rapidity of drying out or cooking of the asphaltic gum due to the action of the suns heat and rays. When this cooking is complete only a felt is left, and this is quickly disintegrated by the action of the elements.

One purpose of my invention is to provide a means whereby the suns rays and heat-are prevented from coming in contact with the asphaltic gum and so prevent the evaporation or oxidation of the gum. A further purpose of my invention is to provide a covering which on account of its color and its composition will reflect or reverse the suns rays and heat instead of absorbing the same. A still further purpose is to reduce the amount of heat transmitted through the roof to the room below, thus obtaining a definitely cooler room temperature, particularly in the effect on the rooms directly below the roof. In addition, my invention provides for greatly increased life of the roof covering and also, because of its white color, makes a roof more attractive to the eye and lends itself to harmony in the landscape surrounding the building.

My composition consists of a mixture of lime, tallow, salt and glue, and experience has indicated that the following proportions produce a superior result: 180 lbs. of lime, 12 lbs. of tallow, 12 lbs. of salt, lb. glue. These proportions are not critical and may be varied within reasonable limits without departing from the spirit of my time stirring the mixture until it is thoroughly mixed and the lime slakred. The amount of water used in mixing with the lime and the tallow mixture is sufficient to change it to a milky white substance. This milky substance is then placed in suitable containers and allowed to cure until it takes the form of a paste, which usually takes about thirty days. When ready to use, transfer to smaller containers for convenience in handling and then dilute with water to a consistency which will permit it to be spread with a brush.

In the application of my composition to a roof which is already provided with a rough surface, such as a roof having a top coat of mineral granules, it is only necessary to brush over the present roof a thin layer of my composition, which when dry leaves a white coat which is impervious to water and which preserves the under coat as well as reflecting the suns rays and heat.

In the application of this material to a roof which has a smooth surface covering, it becomes necessary to apply with a mop an asphaltic gum into which mineral granules are uniformly spread; then, over this surface apply with a brush one coat of my material, the purpose being to provide a binder which will have the roughness necessary to lock the two layers together.

What I claim as my invention and desire to secure by Letters Patent is:

1. A light colored roofing compound composed of one hundred and sixty-five to one hundred and ninety-five pounds of lime; ten to fourteen pounds of tallow; ten to fourteen pounds of salt; one-fourth to three-fourths of a pound of glue, and water sufi'icient to slake the lime.

2. The process of compounding a. light colored roof covering by mixing ten to fourteen pounds of salt with one-fourth to three-fourths of a pound of glue and ten to fourteen pounds of melted tallow, cooling the mixture and spreading it over from one hundred and sixty-five to onehundred and ninety-five pounds of unslaked lime, then applying Water which slakes the lime and produces a homogeneous mixture which is cured by evaporation and then diluted by adding water to a plastic consistency adapted to be spread on a roof.

CHARLIE A. BARTHOLOMEW. 

